According to Juliano, healthy adults should limit caffeine intake to 400 mg per day, or between two and three 8-ounce cups of coffee.
While caffeine is not bad for the elderly in low levels, those who drink more than four cups of coffee daily can experience anxiety, headaches, restlessness and heart palpitations, notes the Mayo Clinic. Too much caffeine overstimulates the nervous system, leading to jitters, an upset stomach and elderly sleep issues.
In moderation, caffeine is fine for most elderly persons. For seniors with ulcers, diabetes, gastritis or osteoporosis, the effects of caffeine may be more harmful and not worth the risk. Consult with your doctor if you have any questions or concerns about your caffeine intake.
The American Academy of Pediatrics (AAP) recommends that kids aged 12 to 18 consume no more than 100 mg of caffeine per day, which is about the amount in a single 8 oz. cup of brewed coffee. But the impact even this moderate amount of caffeine has on young people is less clear than it is for adults.
As you age, your body’s ability to break down drugs and natural products is reduced. However, it turns out that caffeine is not affected; in fact older folk break caffeine down slightly faster than young people.
And studies have shown that regular, moderate coffee drinking may be tied to a reduced risk for Alzheimer’s disease. The protective effect may in part be due to the caffeine in coffee, though coffee also contains antioxidants and other compounds that can be good for blood vessels, including those in the brain.
Most experts agree that getting more than 600 milligrams of caffeine per day is too much. “But if you are sensitive to caffeine, even one or two cups of coffee could cause side effects. Children may be very sensitive to the effects of caffeine. For pregnant women, the safe limit is only 200 milligrams,” says Everett.
Coffee can increase your risk of type 2 diabetes. Caffeine has an affect on your mood. Quitting coffee can lower your blood pressure. Caffeine can increase your anxiety levels.
People with caffeine sensitivity experience an intense adrenaline rush when they consume it. They may feel as if they’ve had five or six cups of espresso after drinking only a few sips of regular coffee. Since people with caffeine sensitivity metabolize caffeine more slowly, their symptoms may last for several hours.
Caffeine energizes the body by mimicking a compound called adenosine, which makes you feel awake, according to the National Sleep Foundation. This process strengthens the feel-good hormone dopamine and triggers the release of adrenaline, giving you a jolt of energy.